The blast of heat generated by a cosmic collision would be similar to nuclear bomb detonations.宇宙碰撞所产生的热爆大体类似于核弹的爆炸。A nuclear bomb could wipe the whole country off the map.一枚核弹可以毁掉整个国家。India started to build a nuclear bomb.印度开始制造核弹。This discovery was to lead to the invention of the nuclear bomb.这一发现引致了核弹的发明。